Box-shaped cantilever crane and welding deformation control method thereof

Abstract

The invention belongs to the technical field of engineering machinery, and discloses a box-shaped cantilever crane and a welding deformation control method thereof.The box-shaped cantilever crane comprises a single boom section, the single boom section comprises a bottom plate, side plates and an upper cover plate, the bottom plate, the left side plate, the right side plate and the upper cover plate are spliced into a box-shaped structure, and bending parts are arranged on the side plates. And the left side plate and the right side plate are placed on a bending machine to be longitudinally bent, the bending force is controlled, the left side plate and the right side plate are deformed with the deformation amount being P1, P1 ranges from 2 mm to 3 mm, the number of bending channels is 2-3, and the left side plate and the right side plate have the cold hardening effect. The method has the beneficial effects that the welding deformation of the box-shaped arm support can be effectively reduced, the planeness, straightness and other form and location tolerances are ensured to meet the design and process requirements, and the bearing capacity of the box-shaped structure is improved.

Description

technical field [0001] The invention belongs to the technical field of construction machinery, and relates to a box-shaped arm frame and a welding deformation control method thereof, in particular to a box-shaped arm frame structure composed of four single plates of an aerial platform vehicle and a welding deformation control method thereof. Background technique [0002] Box-shaped arm frame---same as the ordinary box-shaped section, consisting of upper cover plate, left and right side plates and lower bottom plate. [0003] During the production process of the box-shaped boom, there will be overall deformation, such as longitudinal and lateral shrinkage (total size shortening), deflection deformation, and side bending deformation; horizontal and vertical shrinkage deformation can be compensated by pre-loading margins during blanking or assembly, but The reserved shrinkage allowance in the blanking stage is large, and the size of the reserved shrinkage allowance is not easy ...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems in the prior art that the box-shaped arm frame with a long thin plate has large welding deformation and cannot meet the quality requirements and economic requirements of the steel structure, the present invention provides a box-shaped arm frame and its welding deformation control method, mainly for The box-shaped jib with longer thin plate provides a structural form and process method that is easy to control the welding deformation, which can effectively reduce the welding deformation of the box-shaped jib, and ensure that the shape and position tolerances such as flatness and straightness meet the design and process requirements. Increased load-carrying capacity of the box-shaped structure

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